Adrian Prantl 02474a32eb Move the complex address expression out of DIVariable and into an extra ... argument of the llvm.dbg.declare/llvm.dbg.value intrinsics. Previously, DIVariable was a variable-length field that has an optional reference to a Metadata array consisting of a variable number of complex address expressions. In the case of OpPiece expressions this is wasting a lot of storage in IR, because when an aggregate type is, e.g., SROA'd into all of its n individual members, the IR will contain n copies of the DIVariable, all alike, only differing in the complex address reference at the end. By making the complex address into an extra argument of the dbg.value/dbg.declare intrinsics, all of the pieces can reference the same variable and the complex address expressions can be uniqued across the CU, too. Down the road, this will allow us to move other flags, such as "indirection" out of the DIVariable, too. The new intrinsics look like this: declare void @llvm.dbg.declare(metadata %storage, metadata %var, metadata %expr) declare void @llvm.dbg.value(metadata %storage, i64 %offset, metadata %var, metadata %expr) This patch adds a new LLVM-local tag to DIExpressions, so we can detect and pretty-print DIExpression metadata nodes. What this patch doesn't do: This patch does not touch the "Indirect" field in DIVariable; but moving that into the expression would be a natural next step. http://reviews.llvm.org/D4919 rdar://problem/17994491 Thanks to dblaikie and dexonsmith for reviewing this patch! Note: I accidentally committed a bogus older version of this patch previously. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218787 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-01 18:55:02 +00:00
..
CMakeLists.txt
DAGCombiner.cpp	Use the target-specified iteration count to opt out of any further refinement of an estimate. NFC.	2014-09-30 20:44:23 +00:00
FastISel.cpp	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
FunctionLoweringInfo.cpp	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
InstrEmitter.cpp	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
InstrEmitter.h	Canonicalize header guards into a common format.	2014-08-13 16:26:38 +00:00
LegalizeDAG.cpp	Replace dead links to "Hacker's Delight" with general references. NFC.	2014-09-15 19:47:44 +00:00
LegalizeFloatTypes.cpp
LegalizeIntegerTypes.cpp	Optimize sext/zext insertion algorithm in back-end.	2014-09-19 05:30:35 +00:00
LegalizeTypes.cpp
LegalizeTypes.h	Canonicalize header guards into a common format.	2014-08-13 16:26:38 +00:00
LegalizeTypesGeneric.cpp
LegalizeVectorOps.cpp	Teach the AArch64 backend about v4f16 and v8f16	2014-08-27 16:16:04 +00:00
LegalizeVectorTypes.cpp	Allow targets to custom legalize vector insertion and extraction.	2014-09-12 22:16:11 +00:00
LLVMBuild.txt
Makefile
ResourcePriorityQueue.cpp	Change MCSchedModel to be a struct of statically initialized data.	2014-09-02 17:43:54 +00:00
ScheduleDAGFast.cpp
ScheduleDAGRRList.cpp
ScheduleDAGSDNodes.cpp	Make this SmallVector size a power of two as suggested by Chandler	2014-08-11 13:47:57 +00:00
ScheduleDAGSDNodes.h	Canonicalize header guards into a common format.	2014-08-13 16:26:38 +00:00
ScheduleDAGVLIW.cpp
SDNodeDbgValue.h	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
SelectionDAG.cpp	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
SelectionDAGBuilder.cpp	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
SelectionDAGBuilder.h	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
SelectionDAGDumper.cpp
SelectionDAGISel.cpp	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
SelectionDAGPrinter.cpp
TargetLowering.cpp	Replace repeated null checks with an assert. NFC.	2014-09-15 21:52:51 +00:00
TargetSelectionDAGInfo.cpp